. >> it's a stressful environment. >> reporter: outside pittsburgh when a water main broke in the middle of the night, single digit temperatures gushing watt near a sheet of ice. subzero temps aren't all bad if you like ice boating. skimming across the ice at speeds of up to 60 miles an hour in what looks like a menny kayak with a sail. for those who have to work outside -- >> as long as i bundle up, double bundle, i'm good. i have a lot of clothes on. >> reporter: maybe the best way to get by is thinking hot. >> key largo is a great place this time of year. >> reporter: ah, yes, key largo, been there many a time. let's look at the lowest temperatures overnight across the united states. check these out, mt. washington, new hampshire, 34 below, crane lake, minnesota, 27 below, sayre knack lake, new york, minus 23 and presque isle, maine, haven't been there yet, 23 below zero. out. we are balmy here by comparison. >> it's quite nice here and we should be counting our blessings. the folks we worry are the homeless. what are cities doing to help those who have absolutely nowhere to go? >> th